react-native-paper/example/src/RootNavigator.js

/* @flow */

import React from 'react';
import { StackNavigator } from 'react-navigation';
import { Platform, StatusBar } from 'react-native';
import { Toolbar } from 'react-native-paper';
import ExampleList, { examples } from './ExampleList';

const MORE_ICON = Platform.OS === 'ios' ? 'more-horiz' : 'more-vert';

const routes = Object.keys(examples)
  .map(id => ({ id, item: examples[id] }))
  .reduce((acc, { id, item }) => {
    const Comp = item;
    const Screen = props => <Comp {...props} />;

    Screen.navigationOptions = ({ navigation }) => {
      const { params = {} } = navigation.state;
      return {
        header: (
          <Toolbar
            dark
            statusBarHeight={
              Platform.OS === 'ios' ? 20 : StatusBar.currentHeight
            }
          >
            {!params.showLeftIcon && (
              <Toolbar.BackAction onPress={() => navigation.goBack()} />
            )}
            <Toolbar.Content
              title={Comp.title}
              subtitle={params.showSubtitle ? 'Subtitle' : null}
            />
            {params.showSearchIcon && (
              <Toolbar.Action icon="search" onPress={() => {}} />
            )}
            {!params.showMoreIcon && (
              <Toolbar.Action icon={MORE_ICON} onPress={() => {}} />
            )}
          </Toolbar>
        ),
        /* $FlowFixMe */
        ...Comp.navigationOptions,
      };
    };

    return {
      ...acc,
      [id]: { screen: Screen },
    };
  }, {});

export default StackNavigator(
  {
    home: { screen: ExampleList },
    ...routes,
  },
  {
    navigationOptions: {
      header: (
        <Toolbar
          dark
          statusBarHeight={Platform.OS === 'ios' ? 20 : StatusBar.currentHeight}
        >
          <Toolbar.Content title="Examples" />
        </Toolbar>
      ),
    },
  }
);